diff --git a/benchmark/utils/formats.hpp b/benchmark/utils/formats.hpp
index 208b5612139..62ac1443f52 100644
--- a/benchmark/utils/formats.hpp
+++ b/benchmark/utils/formats.hpp
@@ -210,6 +210,7 @@ std::shared_ptr<csr::strategy_type> create_gpu_strategy(
 /**
  * Checks whether the given matrix data exceeds the ELL imbalance limit set by
  * the --ell_imbalance_limit flag
+ *
  * @throws gko::Error if the imbalance limit is exceeded
  */
 void check_ell_admissibility(const gko::matrix_data<etype> &data)
@@ -222,8 +223,7 @@ void check_ell_admissibility(const gko::matrix_data<etype> &data)
         row_lengths[nz.row]++;
     }
     auto max_len = *std::max_element(row_lengths.begin(), row_lengths.end());
-    auto avg_len =
-        std::max<gko::size_type>(data.nonzeros.size() / data.size[0], 1);
+    auto avg_len = data.nonzeros.size() / std::max<double>(data.size[0], 1);
     if (max_len / avg_len > FLAGS_ell_imbalance_limit) {
         throw gko::Error(__FILE__, __LINE__,
                          "Matrix exceeds ELL imbalance limit");